The primary definition is based around the amazing lifestyle and character of a Bounous. A living Bounous can be equated to God in every way. Never make a Bounous angry because they have amazing powers to smite. A Bounous should be treated with the utmost respect and is known to be one of the greatest people to be in a relationship with.
Pull apart the buttocks of your consenting sex partner, and as per the French greeting kiss each inner cheek from left to right whilst dragging your nose across their bumhole. Voila the dirty bonjour.
"Oh la la" exclaimed Angelique, as I bent her over and warmly welcomed her with a dirty bonjour.
In a billingual province such as Quebec, you have to greet people in English and in French when you work in customer service. After a while, it just becomes one word because you're so used to repeating it over and over. As well, it MUST be "bonjour" that is said first, because French (on the whole) are unforgivably uppity. And don't even THINK about just saying "hi!"